Pulverizing apparatus



e it. 11 1923.

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PULVERI Z ING APPARATUS Filed Aug. 14, 1919 2 Sheets-Sheet l ii.-. g

IN VEN TOR ddm Jul. 50'

ATTORNEYJ Sept. 11, 11923. mamas J. AUBE PULVERIZING APPARATUS Filed Aug. 14 1919 2 Sheets-Sheet 2 Fly. 3

IN VEN TOR ATTORNE YS Patented ept. ii, iaaa NTTE- TATS rattan 'arer care.

JEAN even, or rams, FRANCE.

PULVERIZING APPATUS.

Application filed August 14, 1919. Serial No. 317,518.

provements in or Relating to Pulverizing Apparatus, of which the following is a specification.

The present invention has for its object a pulverizing apparatus which effects an economy of motive power, and is arranged so as to be easily'dismantled and inspected.

This result is obtained by utilizing a turbine in such a way as to cause the air which has carried away the dust to return to the apparatus, after it has been freed therefrom, and by evacuating the pulverized product-s through the upper part ofthe apparatus by means of a circulating trunk communicatin with the interior through openings whic are adjustable in' any manner.

The accompanying drawings represent by way of example a constructional form of the invention.

Figure 1 is a vertical section thereof.

Figure 2 is a horizontal section, and,

Figure 3 is a plan view.

A central shaft 1 carries a turbine 2 and a number of arms 3 to which are hung by joints the spindles of rollers t, which are loose upon these spindles. The shaft 1 has 'a rotary motion imparted to it by means of driving pinions 5 and 6. The material to be pulverized is introduced into the casing of the apparatus through a distributor 11 of any system; it falls between the circular base 12 of the pulverizer and the rollers 4 which, under the influence of centrifugal force, bear strongly against the walls of this base.

A fan of any kind draws air constantly in v a circulating trunk 7 placed at the upper art of the pulverizer, and communicates with the centre thereof by a number of openings 8 provided with adjustable dampers 9. The blast pipe 13 of this fan opens into the base of the pulverizer, below the turbine 2. In this pipe is interposed a dust separator (not shown) of any system.

The marrent of air loaded with dust which rises through the pulverizing apparatus is evacuated through the adjustable openings 8, and forced back by the fan into the pulverizer, then the air freed frOm dust returns to the base of the pulverizer, whence it is distributed to the interior by the turbine 2 the blades of which are preferably directed in such a way that the air passes without any shock.

14 denotes scoops rotating with the rollers and with the turbine and serving to project the materials towards the grinding zone.

The adjustment of the position of the dampers 9 permits, by causing the depression of the'gaseous current to vary, the obtaining at pleasure of such fineness of the products as may be desired, and the suction through the periphery of the pulverizer into the circulating trunk 7 permits complete freeing of the upper part of the apparatus which makes cleaning and inspection more easy.

The utilization of the turbine 2 to assist the reentrance of the air into the pulverizer permits the reduction of the losses of load to a minimum and of economizing an important fraction of the motive power necessary to the removal of the dust.

Claims:

1. A. pulverizing apparatus, comprising a casing the bottom of which is provided with a central opening, pulverizing devices acting against the internal periphery of the eas- 'ing, a suction pipe communicating with the upper part of the casing, a blast pipe ex tending below the opening in the bottom oi the casing, a rotative distributor of air placed over the said opening and adapted to force the entering air from the center outwardly towards and into the grinding zone at the periphery of the casing.

2. A pulverizing apparatus, comprising a casing, pulverizing devices in the casing, a

suction pipe communicating with the upper part of the casing through a plurality of apertures, an adjustable regulating device for each of the said apertures. a I'otative distributor of air placed below the pulverizing devices, the pulverizing devices and air distributor being mounted on a common shaft, and a blast pipe opening into the lower portion of the casing and below the rotative air distributing device.

3. A pulverizing apparatus, comprising a casing having on its internal periphery a circular base, rotatable pulverizing rollers mounted in the casing and co-operating with the said circular base, means for feeding the material into the casing above the said rollers, a suction pipe communicating with the upper portion of the casing, a rotative air ing with the aperture of said partition, a,

' distributing device mounted in the lower portion of the casing on the shaft of the pulverizing rollers and below the said rollers, scoops in the casing and adapted to ro-- tate with the pulverizing rollers, an a blast pipe opening into the lower portion f the casmi 41-. I pulverizing apparatus comprisin a casing, a peripheral circular base an a horizontal partition centrally apertured, a suction pipe communicating with the upper part of the casing, a blast pipe communicatan rollers between the turbine and casing, and

means for feeding the material into the cas ing above the pulverizing rollers. 5. In a pulverizin apparatus, the comblnation of a case the ottom of which is procry of the case, an air inlet pipe leading to the opening in-the bottom of the case, and a rotary airdistributor arranged above the said bottom opening and under the pulverizing means and adapted to drive the air entering at the middle towards the pulverizing area at the periphery of the case.

lln testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

v JEAN AUBE. Witnesses:

GHAs. P. PRnssLY, MAURICE Row 

